How to give a visual indication to the user that something has happened using UILabel.
Cocoa Pods is an Objective C library manager that manages library dependencies for your Xcode project
How to support orientations
How to use drag and drop in Android. It is based on Eclipse 4.2 (Indigo), Java 1.6 and Android 4.2.
How to control the network connection with xcode
How to vibrate your device
How to collect the the Strings starting with “@” and “#”, but this things can be changed by simply changing the Patterns that you require and giving the proper Regular Expression for them.
How to create an app icon and install it